usestd::ops::AddAssign;#[derive(Debug, Copy, Clone, PartialEq)]structPoint {    x: i32,    y: i32,}implAddAssignforPoint {fnadd_assign(&mutself, other:Self) {*self=Self{            x:self.x + other.x,            y:self.y + other.y,        };    }}letmutpoint = Point { x:1, y:0};point += Point { x:2, y:3};assert_eq!(point, Point { x:3, y:3});